Combined guiding and feeding device for crank embroidery machines and the like



July 17, 1928.

1 t e e .n 4 s t a K m% C 2 R E 0 PH L A. KOCH COMBINED GUIDING AND FEEDING DEVIC EMBROIDERY MACHINES AND THE Filed Feb, 27, 1925 @TI Y m cl 5 .l

[2: Usni'an Affba]:

July 17, 1928. 1,677,559 A. KOCH COMBINED GUIDING-AND FEEDING DEVICE FOR CRANK EMBROIDERY MACHI AND THE LIKE Filed Feb. 1925 2 Sheets-Sheet 13 .3. 111 ,49. 2, 4

1 '1' 1' 1.. l ,L' MW 5 g 4 46 1Z Z .Zhueni'zzn Patented July 17, 1928. I

rs-o sures PATIENT ;orricE.

A-Lorsxoen, or BERLIN, GERMANY, assxenonnewsman-012mm snow I MASCIIIN-ENFABRIK' sqnmmn, BLAH :& 00. mm. 3. 11., orrmmm, crummy.

COMBINED GUIDING AND FEEDINGDEViCE Fen cnanx TEE-LIKE. I

Application filed February. 27, iazsfseriai m. 12,068, and in Germany'June 25, 1924.

My invention relates'to improvements in combined guiding and feeding devices for crank embroidery machines and the like and the object of the invention is to devisehan 5 improved guiding andfeeding means which embroider the -feedlever.

will be free fromthe disadvantages inherent to the present machines of this type in which the wear and'tear onthe respective parts-is excessive and results in 'an'inaccurate and shaky action ofthe feeding mechanism.

:H1therto,i with crank embroidery, crank hemstitch and sewing mach ines,'it'has-been customary to'provide a feed'leve'r-which car- .ries the presser footandwhich'is suspended :tr'om' a comparatively high point in i such a manner as to becapa 1c of swinging to'each side inforder ,to' be able to follow the driving pressure of an *eccentricQ Suchpoint of suspension o'fthe' feed lever canhe shifted-or adjusted vertically in a guide and which comprises. a guide f bar located-on one side; of said SUSPBIISIQH po nt with a pivot pro ect1ng to one side of the bar and arrangedparallelly to the vertical axis of the needle tube.

:My invention consists in prov ding an mproved guiding device comprising a two sided slide v guide, and pivot guide at the supporting block cit-the fe'ed lever, all as hereinafter more particularly described and illustrated in the accompanying drawing in which:- 1 Fig. 1 is a'front -view of; onetype-o't'crank machine showinglmy improvements appliedthereto. I I Y -lEig. Qis a horizontal ears- Fig.3 is a plan. view of my improved means for giving a'swinging movement to sectionon the line Fig. lis a cross section therethrough.

Fig. 5'is an enlarged ihorizontal [section through the block for supporting the feeder lever. 4 v Fig. 6 is an end viewthere ;f,-and

Fig. ;7 is a;perspectiveviewof ajmodi'fied 'zformof guide member.

Like characters of reference indicate eorresponding pa-rtsin the diflerentvicws. I

A denotes the frame-plate which is attached to the embroidery machine head and to which the working members are attached in close proximity, said members and their operation being well known in embroidery machines, and orm no part or my invention.

The-needle cylinder 1, the needle bartubeQ,

slide 4: can, thus, reciprocatebet'ween this plate A and the bracket? Aforked member 10 extends to the left from the lower end of said slide 4 and engages two eolla rs'll and 12 provided at the upper end ofthetube 3, whereby this tube and the slideare coupled with each other. A similar 'forked member 9 extends to the left from about the middle portion o'f-the'slide 5. This slide is guided also between the frame 'late A and the bracket 7,'-but{is guidedalso Ey a bracket mfbehind which it extends vertically along the front face of the plate A} Below the bracket 7 the respective end'of the slide 5 is located above-the slide 4. {The forked member 9'engages two collars pertaining to a sleeve Bfsurmundingthe tube 2, which is, therefore, coupled with the slide Q2, Fig. 1 denotesthe feedlever whiclt'is 'U-shap'ed-at vita l ower endg and forked at its upper end {The lower, endrecei-ves the presserfo t ,whichI; have not shown as it does-not form a part of the tion. The fork-g is coupled with a block-k by screws 0. Th-isblo'ck embraces the-tube 2' and can be shifted a little along it; the

EMBROIDERY MACHINES AND located therein and the middle tube 3, are

present invenl block his coupled bygmean's of a pivot c I (shown in dotted linesin'Figs'l and ,2) with a bracket 6 projecting forth forwardly from a'slide aguided in the to *portionflof the frame plate Afas well as ya bracket 13. The slide a is continuallymoved up and down by themachine-by the intermediary of suitable members (not shown),and as the lever gag is coupled with it, also-this lever tlli wards and downwards, corresponding to the up and down motion of the slide a.

In existing constructions the guide-way of the slide (L and a one-sided bearing 6, arranged as described relatively to one another, must stand all strains transmitted to the point of suspension at 0 0, and it has been found that, owing thereto, the guideways concerned are quickly worn out by. grinding, and that a positive motion free of shakes of thefeed-lever 2 which is actuated in known manner by an eccentric 9" is-practically unattainable. I v r In my construction the pivot pin 0 on the guide block .(Fig. 5) is supported in a sleeve in which it is supported somewhat eccentrically, as shown in Fig. 6. The object of this arrangement is to render possible the bringing into agreement the axis of this pivot accurately and centrally with the axis of the vertical bore as well as the guide-way on the other side, whereby the guiding" is improved quite considerably and is rendered nearly completely free from wear and tear. By means of the nut 41 which encompasses the slit end of the sleeved bearing 6 the holding device is held in its adjusted position.

Owing to the fact that the auxiliary pivot 0 with its slide member 2' functioning in the guide m receives an accurate additional guidance, wear and tear is reduced considerably and a great portion of the strain is done away with. In the event of wear my construction permits the adjusting of the parts without any necessity of providing new blocks.

My eccentric device illustrated in Figs; 3 and 4 is characterized by the fea-' ture that the ring 7* is designed to form a clamping collar 1" and is provided with. an annular insertion 6 having an outercirc1unferential groove containing an annular memmer It is, by this arrangement and combination of these parts, rendered possible on one hand to adjust accurately the parts concerned in orderto permit the insertion e -to turn freely, without binding, and on the other hand to exchange easily the member or ring f which serves as an exchangeable bearing for the rotatory insertion and constitutes a member taking up the wear and tear and is replaceable on becoming worn by an accurately fitting new ring. a

The sleeve 8 is'provided with a sloping guideway disposed laterally thereon and adapted to beengaged by the upper arm of a double armed lever 14, pivoted to the member 15 and extending with its lower arm through a recess near the annular shaped member e carried within a ring (Fig. 1).

separately The said member 15, prismatically shaped at its lower part, also engages a quadrangular opening of the member 6.

Referring to Fig. 7 which shows amodi .fication of the guideway bracket illustrated What I cla m as my invention is: 1. In'a sewing or embroiderlng machine, the combinatlon with a feed slide, needle holder tube, bearing blocktherefor, and feed lever connected tothe block, o'f'abracket, extending outwardly from the feed. slide,

and eccentric means for pivotally supporting the block on the bracket so capable of adjustment.

2. In a sewing or embroidering machine, the combination with a feed slide, needle as to be holder tube, bearing block therefor and reedj lever connected to the block, of a bracket extending outwardly from thefeed slide and having a horizontally disposed sleeve portion, an eccentrically bored sleeve within the sleeve portion, and a pin secured to .the guide block and extending into the bore of the sleeve.

3. In a sewing or embroidering machine,

the combination with ya feed slide, needle holder tube, guide block therefor, and feed lever connected :to the block, 10f abracket extending outwardly from the feed slide and having a horizontally disposed sleeve portion, an eccentrically bored sleeve within the sleeve portion, a pin secured to the guide block and. extending into the bore of the sleeve, a forked upper. end. on the feed lever, and pivot pins constituting trunnious extending through the forked endof the feed lever into the blocle 4. In a sewing or embroidering machine, the combination with a feed slide,'needle holder tube, bearing block therefor, and feed lever connected tothe blo k, of a bracket extending outwardly from the feed slide and having a horizontally disposed sleeve, portion, an eccentrically, bored sleeve within the sleeve portion, a pin secured to the guide block and extending intothe, bore of the sleeve and a second pin extending outwardly from theblock on the opposite side tothe first mentioned pin, aslide member, said second pin extending intog'a hole 'in the slide members 1 g i In testimony whereof I affix my signature.

A Y KOCH- 

